A lot of friends in the use of U disk or mobile hard disk, have encountered such a problem-when the use is over, can not from the desktop in the lower right corner of the system tray pop-up device, click Pop-up, the system will be prompted: now can not stop the ' universal volume ' device. Please stop the device later.
This is because there are still open files or programs on the USB disk or on the mobile hard drive, or there are local programs still accessing these mobile devices. At this point, you should first close all windows and programs associated with your mobile device, and then eject the device.
If you still can't, you can do this by clicking "Start"-"Run" and enter fsutil volume dismount x: Carriage return, where x: Is the system's assigned letter to your mobile device. The function of this command is to forcibly uninstall the volume, and then you can click the icon in the system tray to eject the mobile device.
PS: To perform a pop-up device command, the left-click icon for a mobile device is less than the steps required to right-click the icon.